using System;
using System.Diagnostics;
using System.IO;

namespace Org.BouncyCastle.Utilities.IO
{
	public abstract class BaseOutputStream : Stream
	{
		private bool closed;

		public sealed override bool CanRead { get { return false; } }
		public sealed override bool CanSeek { get { return false; } }
		public sealed override bool CanWrite { get { return !closed; } }
		public override void Close() { closed = true; }
		public override void Flush() {}
		public sealed override long Length { get { throw new NotSupportedException(); } }
		public sealed override long Position
		{
			get { throw new NotSupportedException(); }
			set { throw new NotSupportedException(); }
		}
		public sealed override int Read(byte[] buffer, int offset, int count) { throw new NotSupportedException(); }
		public sealed override long Seek(long offset, SeekOrigin origin) { throw new NotSupportedException(); }
		public sealed override void SetLength(long value) { throw new NotSupportedException(); }

		public override void Write(byte[] buffer, int offset, int count)
		{
			Debug.Assert(buffer != null);
			Debug.Assert(0 <= offset && offset <= buffer.Length);
			Debug.Assert(count >= 0);

			int end = offset + count;

			Debug.Assert(0 <= end && end <= buffer.Length);

			for (int i = offset; i < end; ++i)
			{
				this.WriteByte(buffer[i]);
			}
		}

		public virtual void Write(params byte[] buffer)
		{
			Write(buffer, 0, buffer.Length);
		}
	}
}
